Pulley-block



' WITNESSES L 0. LEVIN. PULLEY BLOCK.

APPLICATION FILED SEPT. H, 1918- 1,339,931, Patented May 11',1920

INYENTOR.

ATTORNEY.

UNITED STATES PATENT OFFICE.

NILS D. LEVIN, or COLUMBUS, 01110, ASSIGNOR To'rHE anirrnnr MANFAoTnRIne COMPANY, or COLUMBUS, OHIO, A oonronarron or oHIO.

PULLEY-BLOGK.

Application filed September 11, 1918.

To (ZZZ whom it may concern:

Be it known that I, Nine D. LEVI-N, a citizen of the United States,residing at Golumbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Pulley-Blocks, of

which the following is a specification, reference being had therein tothe accompanying scribed which may be securely attached to a machineframe or similar structure at points where it may be desirable to applythe draft of a rope or similar flexible draft member, and which may beconveniently removed when such attachment becomes no longer desirable.

The devices by which I attain this object are fully set forth in thefollowing specification reference being had to the accompanying drawingsof which Figure 1 is a plan new of the preferred embodiment of myinvention 1n working relation with the feed rope and frame of a miningmachine, or similar device.

Fig. 2 is a view of the device illustrated in Fig. 1 with the frame partin position to permit engagement of the feed rope preparatory toattachment to the machlne frame.

Fig. 3 is a section along the line 3--3 of Fig. 1.

Fig. 1 is a fragmentary view of the frame of a mining machine adapted tothe attachment of my improved pulley block.

Figs. 5, 6 and 7 are diagrammatic figures illustrating the use of myinvention.

Like numerals refer to similar parts in the several figures.

In Figs. 5, 6 and 7 of the drawings I have, for the purpose ofillustrating the application of my improved pulley block,diagrammatically illustrated a well known mining and loading machinewherein the operative parts are mounted upon a sub base 1 adapted torest upon and slide in any direction over the floor of the mine.

' This machine is provided with feeding mechanism comprising a feed rope2 which Specification of Zetters Patent.

Patented May 11, 1920 Serial No. 253,634.

is arranged to be connected to a suitably placed anchor jack 3 to movethe machine bodily over the floor of the mine. Suitable guide sheaves 1are permanently mounted upon the rear end of the sub base 1 and overthese the feed rope may be led from the tensioning device upon themining machine to'either side of the sub base. In Fig. 51. have shownthe arrangement of the feed rope 2 and anohorjack 3 to move the rear endo'f 'the machine-to the right. It is apparent that when the entiremachine is to be moved laterally the strain of the feed rope must beapplied at a point in the line betweenthe anchor jack and the center ofgravity of the machine as illustrated in Fig. 6, and if the forward endof' the machine is to be moved such strain must be applied near theforward end of the frame as shown in Fig. 7. If guide sheaves such asare shown at 5 and 6 were permanently attached to theframe of themachine'at all of the points at which it might be desirable to applysuch strain, they wouln seriously interfere with the operation of themachine near the side walls of the mine.

To avoid such interference I have provided my improved detachable pulleyblock comprising a sheave Wheel 7 having its circumferential groove 8adapted -to engage the feed rope 2 of such a mining machine or a similardraft member. The sheave wheel 7 is journaled upon a short shaft 9mounted in" apertures of two supporting brackets 10 and 11 which areheld in working relation with said sheave wheel by the head 12 formed atone end of the shaft 9 and by a collar 13 secured at its other end .by asuitable cotter pin 14. The brackets 10 and 11 are each independentlyrotatable about the shaft 9 and each is provided with '7 an inwardlyextending flange 15 and 16 adapted to meet along the centrallongitudinal plane of the sheave wheel 7. The flanges 15 and 16 extendrearwardly from and at right angles to the longitudinal central plane ofthe frame member 18 and to engage its inner surface to prevent movementof the pulley block away from said frame member. A cylindrical stud 22formed of companion semi cylindrical projections at the rear end of theflanges 15 and 16 is arranged toens gage a second aperture 23 in theframe member 18 to prevent movement of the pulley gether and the stud 19is inserted in the aperture 20 of the frame member 18. By a rear.- wardrocking movement of the brackets '10 and 11 upon the forward ends oftheflanges 15 and 16 the hooks 21 may be brought into contact with theinner surface of the frame member 18, and the stud 22 inserted in theaperture 23. Tensionupon the feed rope 2 in the directions ofthe arrowsin Fig. 1 tend to produce rotation of the parts about the, hook 21 whichholds the surface 17 in contact with the frame member 18; The

hooks '21 resist the outward strain of the feed rope 2 and the stud 22resists its rear,- ward straln thereby maintaining the desired relationof the sheave wheel 7 to the frame of the machine. After the strain uponthe rope 2 has been relieved the brackets 10 and 11 may be rockedforward to release the lugs 22 from the aperture 23 after which the hook21 may be withdrawn from the aperture 20. While I have illustrated anddescribed my invention with especial reference to its application to amining machine I do not limit myselfto such an application or theprecise details of construction here shown as it is apparent that thesedevices may be subject to wide modification without departure from thespirit of my invention.

hat I claim is The herein described detachable pulley support formed intwo similar halves, each half having a wide base plate, formed with astraightflat surface 17, adapted to bear against a base surface andhaving two hook h alves 19, adapted, when registering, ,to form asinglehook, and two pin halves 22, adapt ed to form a single pin to enter thebase element, the pulley being mounted in the outer ends of said platesand held rigidly. against displacement, in any direction 'when thestrain is on the cable.

- In testimony, whereof I affix my signature in presence of twowitnesses.

NILS D. LEVIN.

lVitnesses HARRY C. DEAN, ANNA M. FENLoN.

